When you home, and you've eaten, make a solution of ine teaspoin of water, a pinch of salt in a litre of water. Slowly sip at it over the day. It will replace electrolyles and rehydrate you beautifully. It's a magic elixer we used when we were younger. If you can sllep for a couple of hours it will have an even better effect. I know how you feel with the guilt though, I felt it every time I felt even a slight hangover and would spend the next day very tearful and angry at myself! I stopped drinking altogether now. Anyway, I hope you feel bettet fast and your show goes brilliantly! Xxx